EP0915549A2 - Strömungsvorrichtung - Google Patents
Strömungsvorrichtung Download PDFInfo
- Publication number
- EP0915549A2 EP0915549A2 EP98119067A EP98119067A EP0915549A2 EP 0915549 A2 EP0915549 A2 EP 0915549A2 EP 98119067 A EP98119067 A EP 98119067A EP 98119067 A EP98119067 A EP 98119067A EP 0915549 A2 EP0915549 A2 EP 0915549A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow device
- flow
- supply voltage
- evaluation unit
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000011156 evaluation Methods 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000012806 monitoring device Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 238000013021 overheating Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 241001503991 Consolida Species 0.000 description 1
- 102000000429 Factor XII Human genes 0.000 description 1
- 108010080865 Factor XII Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008672 reprogramming Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/093—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against increase beyond, or decrease below, a predetermined level of rotational speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
Definitions
- the invention relates to a flow device, in particular Suction device, with one of an electric Motor driven rotor for generating a flow in a flow channel.
- Such flow devices are, for example around suction devices, the flow channel formed by a suction line or a suction hose is.
- Suction devices of this type are among others machining manufacturing processes used by the Vacuum off the chips removed from the workpiece.
- a monitoring device for monitoring the flow provided during the operation of the flow device which has a detection device which at least the motor speed and the motor current as operating parameters recorded and for evaluating an evaluation unit in which the measured engine speed or the measured motor current with a corresponding standard value is compared, depending on the one or the other Operating parameters is specified, with a warning signal is generated when the measured value from the determined Deviates from the normal value by an impermissible amount or factor.
- the acquisition of the operating parameters is used for monitoring the flow device, at least motor current and Engine speed can be detected.
- the evaluation unit can use a characteristic field or a table for each measured motor current or for each measured Engine speed the associated standard value from the determine other operating parameters and with that actually Compare the measured value. Impermissible operating states can be recognized quickly in this way that appropriate countermeasures can be taken.
- the determined standard value is expediently the minimum engine speed. about the speed of the engine can also on the flow velocity of the flow medium in Flow channel are closed.
- the engine speed is advantageously controlled by means of a permanently excited measuring coil of the detection device is detected, the measuring coil with rotor blades arranged on the rotor is in magnetic contact. It is about a simple and reliable way of Speed measurement.
- the fact that the flow channel cross section by means of a The setting switch can be specified is for its detection no complex sensors required. Because the flow channel cross section is usually unchanged here in favor of the reduced effort of an automatic Capture be excluded.
- the setting switch formed by a potentiometer which is convenient has several rest positions and together forms a tap changer with the evaluation unit. A such a structure is very simple and inexpensive.
- the motor can also be in an advantageous embodiment supply voltage from the detection device be recorded as operating parameters. Prohibited Fluctuations in the supply voltage are thereby recognized.
- the supply voltage is in the form of an AC voltage. This could, for example, from the usual 230 volt network be won, which is normal for energy supply is used in buildings.
- the evaluation unit has a has programmable microcontrollers. Through this The evaluation unit can take the measure in a simple manner Change the programming to be changed, for example adapt to new needs.
- the evaluation unit has a memory contains, in particular from a read-only memory and / or EEPROM is formed. This will increase the flexibility of the Evaluation unit improved. They remain in an EEPROM stored data even after the power supply has been disconnected receive.
- a characteristic field can be stored in the memory of the evaluation unit or a table can be stored by means of which the Standard value can be determined. That way is to everyone permissible operating state a standard value can be determined.
- the characteristic field to new Operating conditions is customizable. For example hereby the characteristic field to a changed ambient temperature be adjusted at the flow device is operated. Even after repair work or on Due to aging processes of the components of the flow device calibration may be necessary.
- the calibration device triggers during operation located flow device on request Calibration process, the characteristic field to the current operating parameters is adjusted. There is no time-consuming reprogramming of the characteristic field necessary, but its adaptation becomes automatically based on the current operating parameters carried out.
- the others permissible operating conditions based on the during the Calibration recorded operating state accordingly new Are defined.
- the calibration device only by entering a code sequence beforehand operated to prevent accidental or from Prevent unauthorized calibration.
- the calibration device is contained in the evaluation unit, so that a more effective Utilization of the installation space and the capacity of the evaluation unit is achieved.
- the data stored in the memory can be saved using a Control device can be read out to the correctness of the Check data or find and find any errors correct.
- Another advantageous measure is that the Monitoring device after applying the supply voltage carries out a self-test, the correct Function of the flow device checked and expediently the presence of an error if necessary is shown. This can cause malfunctions the flow device already detected when switching on become.
- a flow device is, for example around a suction device, one for generating the Flow in a flow channel from an electrical Motor driven rotor has.
- the rotor is with Provided rotor blades and thus constructed like a fan.
- the flow channel is usually formed by a flexible suction hose.
- suction devices are, for example, industrial or Household vacuum cleaners. Of course it could itself in the flow device according to the invention are air conditioners, heating systems or the like.
- the flow device has one for monitoring the flow monitoring device provided during operation 10, whose block diagram in Fig. 1st is shown.
- the monitoring device 10 has one Detection device 11, which for the detection of several Operating parameters during the operation of the flow device serves.
- Detection device 11 which for the detection of several Operating parameters during the operation of the flow device serves.
- These Operating parameters are preferably used as operating parameters the supply voltage used to power the motor, the motor speed, the motor current flowing through the motor and the flow channel cross section is detected.
- An alternative Embodiment it would also be possible, only to detect the motor speed and the motor current.
- the detection of the flow channel cross section is in particular then makes sense if it can be changed, e.g. by replacing one that forms the flow channel Suction hose in a suction device. Capturing the Supply voltage is usually only used for control purposes, since these usually have a certain value, e.g. 230 V, is stamped. As already mentioned, that's enough Acquisition of motor current and motor speed for monitoring however basically out.
- the operating parameters detected by the detection device 11 are used to evaluate an evaluation unit 12 supplied which the measured engine speed or the measured motor current with one of the other operating parameters compares the determined standard value. To this In this way, the evaluation unit 12 can assess the current one Carry out the operating state of the flow device.
- the operating parameters for determining the standard value are at least the engine speed or the Motor current and, according to the example, additionally the flow channel cross section and the supply voltage is available.
- the detection device 11 comprises a speed detection unit 14, used to measure the current engine speed serves.
- the speed detection unit contains 14 a permanently excited measuring coil with the rotor blades of the rotor is in magnetic contact. By the rotation of the rotor becomes the rotor blades on the measuring coil moved past, so that the generated by the measuring coil Magnetic field changes and the number of units per time moving rotor blades can be determined. Consequently the engine speed can also be determined.
- the speed detection unit 14 could also other means for determining engine speed, such as B. have a Hall element with a permanent magnet works together.
- the flow channel cross section is recorded via a setting switch 15, by means of which the flow channel cross section can be specified.
- the flow channel cross section could also be automatic be determined by an appropriate sensor system, of which in the preferred embodiment in favor of one reduced component and cost expenditure.
- the setting switch 15 is preferably a potentiometer formed, in particular several rest positions has, whereby between several specific flow channel cross sections can be switched. Together with The evaluation unit 12 thereby forms the potentiometer a tap changer.
- the detection device 11 comprises a current detection unit 18 and a voltage detection unit 19.
- the structure of the current or voltage detection unit 18 or 19 is basically arbitrary and can be applied to the respective be adapted to the existing circumstances. For example it must be taken into account whether the Supply voltage around a DC or AC voltage acts.
- the supply voltage is in the form of an AC voltage, e.g. obtained from the conventional 230 volt power grid can be.
- the motor current is therefore an alternating current.
- the standard value is determined and in the evaluation unit 12 with the measured motor current or the measured motor speed compared.
- the standard value can be, for example a table or a characteristic field can be obtained.
- the flow device whose detection device 11 only the motor current and the engine speed detected, could be from a table of motor current assigned to a specific speed or vice versa.
- the norm value obtained in this way is then compared with the measured value (motor current or engine speed) compared.
- the standard value becomes dependent on several operating parameters the structure of the table or the Characteristic field more complex, the determination of the standard value however, it is based on the same principle.
- the signal output device 22 formed by a bugle, so that the Warning signal is an acoustic warning tone. It understands yourself that the warning signal is also visual or simultaneous could be acoustic and visual.
- the determined standard value could be, for example is the minimum engine speed. Now, e.g. on Due to a blockage of the flow channel and / or a filter device, the difference between the measured engine speed and the from the minimum engine speed standard value around the impermissible The evaluation unit would differ in amount or factor 12 by means of the signal output device 22 Generate warning signal.
- the evaluation unit 12 has a programmable Microcontroller 25 and one expediently from one Read-only memory and / or EEPROM-formed memory 26.
- memory 26 is a characteristic field or a table filed to determine the standard value by the microcontroller 25 of the evaluation unit 12 is used.
- the norm value in particular from the table stored in the memory 26 read. This can then be compared with the measured motor current value and / or compared with the measured engine speed become.
- the data stored in the memory can be saved using a Control device can be read to ensure their accuracy check and correct errors if necessary can.
- a control device for example is a computer that stores the data of the Memory 26 can output on his screen.
- the flow device also includes a manual one adjustable power control of the engine so that the Performance set according to the given needs can be.
- a suction device is on this type selected the desired suction power. Since the Supply voltage here in the form of an AC voltage is present, the power control of the engine is advantageous realized by a phase control. The structure and mode of operation of such Phase control is already well known so that for a more detailed explanation at this point is waived.
- the flow device or after repairs Possibility that the permissible operating range of individual or several operating parameters changed. This could lead to incorrect evaluations in the evaluation unit 12 lead and thus the function of the monitoring device 10 affect.
- the preferred embodiment via a calibration device 29, which is preferably in the evaluation unit 12 is included.
- the calibration device is exemplary 29 in the microcontroller 25 of the evaluation unit 12.
- the calibration device 29 could of course a separate unit from the microcontroller 25 form. It would also be conceivable for the calibration device 29 by a trimpotiometer, via which the evaluation of the motor current can be changed.
- the calibration device 29 triggers with flow device in operation on request the calibration process, whereby the in the memory 26 stored table to the currently available Operating parameters is adjusted. That means everyone other, also permissible operating states from the current one at the time of calibration Operating status by changing the table entries to be redefined. In this procedure, one is Calibration possible at any time and without great effort because no complex work on the monitoring device 10 must be made.
- a code sequence can be operated.
- the embodiment is the code sequence using the Adjustment switch 15 can be entered. Receives the calibration facility 29 the correct code sequence, the Calibration process started. The existence of a calibration request is only in the present case after Switched on the flow device queried. It would be alternatively, however, it is also possible to query for to execute an existing calibration request cyclically, so that calibration would be possible at any time.
- an emergency shutdown unit 32 which when the Motor disconnects this from the supply voltage.
- the emergency shutdown unit 32 For Measuring the temperature of the engine can be the emergency shutdown unit 32 have, for example, a temperature sensor. When a certain temperature limit is exceeded then an interruption switch in the Emergency shutdown unit 32 actuates the engine from the Disconnects supply voltage.
- the emergency shutdown unit 32 is replaced by the evaluation unit 12 controlled.
- the evaluation unit 12 receives a temperature measurement signal, evaluates this and operates if necessary the interruption switch in the emergency shutdown unit 32.
- a renewed application of the supply voltage to the motor is here only after the overheating condition has ended possible, so that a restart interlock of the motor overheating is realized.
- the emergency shutdown unit 32 from the evaluation unit 12 disconnect, the circuit breaker depending can be operated directly from the engine temperature.
- the break switch trade a so-called bimetal switch.
- the monitoring device 10 When switching on the flow device, that is after the Applying the supply voltage leads the monitoring device 10 through a test, taking the proper Function of the flow device is checked. To the Example can be determined here whether a rotor blade is broken whether on all areas of memory 26 can be accessed or whether the detection device 11 works properly. If there is a Error is stored in the memory 26 and can via the control device can be read out. According to example additionally the signal output device 22 from the evaluation unit 12 activated so that the presence of an error is recognizable to the operator. Via the control device the operator can then find the exact error determine and take appropriate action. It it goes without saying that the signal output device 22 also has a Display box that could have the exact error immediately displays, so that an additional query by means of of the control device could be omitted.
- the microcontroller 25 of the evaluation unit 12 is in the present embodiment with a supply and Auxiliary control arrangement 35 connected to the necessary and advantageous peripheral wiring of the microcontroller 25 represents.
- a supply and auxiliary control arrangement 35 are, for example, the power supply and the Control of the microcontroller necessary clock generation realized.
- a reset circuit for Resetting the microcontroller 25, a network synchronization or similar functional blocks in the supply and Auxiliary control arrangement 35 can be provided.
- Step 51 queries whether the memory 26 of the evaluation unit 12 can be read out by means of the control device should. If this is the case, the evaluation unit 12 outputs the memory 26 free for reading and runs through the READ infinite loop (step 52).
- step 51 follows the step 53, in which it is queried whether that of the Monitoring device 10 performed test for detection the proper functioning of the flow device has made an error or not. Is a If there is an error, the error in Memory 26 stored and by means of the signal output device 22 issued the warning signal.
- step 53 is followed by step 55, which queries whether entering the code sequence for commissioning the calibration device 29 takes place. This query yes, it is determined in the subsequent query 56, whether the code sequence was entered correctly. Is if so, step 57 is run through, during which the calibration process is carried out. Subsequently the calibration data in step 58 in the Microcontroller 25 loaded.
- Step 57 Calibration data are in the microcontroller 25 Evaluation unit 12 loaded.
- the hose diameter is subsequently shown in step 59 detects what in the present case by the setting switch 15 given value.
- the downstream Steps 60-62 are in the detector 11 then the supply voltage one after the other, the motor current and the motor speed are determined. Subsequently becomes the norm value depending on the concerned Operating parameters determined and with the measured engine speed or compared to the measured motor current (Step 63). Deviates the measured engine speed or the measured motor current from the determined standard value by inadmissible amount or factor, so in step 64 the warning signal is output via the signal output device 22. On the other hand, there is the difference between the measured value and the determined standard value within the permissible range, so the warning signal is switched off.
- step 65 it is finally checked whether a The motor has overheated. If so, so the evaluation unit 12 becomes an endless waiting loop offset, which prevents further operation of the engine (step 66).
- step 65 follows step 59 again, in which the flow channel cross section is detected.
- Steps 59-65 are then performed during operation of the Run through the flow device sequentially if the Engine is not overheated. Only after switching off and when the flow device is switched on again steps 50-58 are also carried out again.
Landscapes
- Control Of Electric Motors In General (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
- Fig. 1
- ein Blockschaltbild einer Überwachungseinrichtung einer erfindungsgemäßen Strömungsvorrichtung und
- Fig. 2
- ein Ablaufdiagramm, das die beim Betrieb des bevorzugten Ausführungsbeispiels der Strömungsvorrichtung von der Überwachungseinrichtung durchzuführenden Schritte aufzeigt.
- 50:
- Einschalten
- 51:
- Abfrage: Speicher auslesen?
- 52:
- Endlosschleife AUSLESEN
- 53:
- Abfrage: Test o.k.?
- 54:
- Fehler abspeichern, Signal geben.
- 55:
- Abfrage: Eingabe der Codesequenz?
- 56:
- Abfrage: Codesequenz korrekt?
- 57:
- Kalibrieren
- 58:
- Kalibrierdaten aus Speicher laden
- 59:
- Strömungskanalquerschnitt erfassen
- 60:
- Versorgungsspannung ermitteln
- 61:
- Motorstrom ermitteln
- 62:
- Motordrehzahl ermitteln
- 63:
- Normwert bestimmen und mit Motordrehzahl bzw. Motorstrom vergleichen
- 64:
- Warnsignal Ein/Aus
- 65:
- Abfrage: Motor überhitzt?
- 66:
- Endlosschleife WARTEN
Claims (21)
- Strömungsvorrichtung, insbesondere Saugvorrichtung, mit einem von einem elektrischen Motor antreibbaren Rotor zur Erzeugung einer Strömung in einem Strömungskanal, dadurch gekennzeichnet, daß eine Überwachungseinrichtung (10) zur Überwachung der Strömung während des Betriebs der Strömungsvorrichtung vorgesehen ist, die eine Erfassungseinrichtung (11) aufweist, die wenigstens die Motordrehzahl und den Motorstrom als Betriebsparameter erfaßt und zur Auswertung einer Auswerteeinheit (12) zuführt, in der die gemessene Motordrehzahl oder der gemessene Motorstrom mit einem entsprechenden Normwert verglichen wird, der in Abhängigkeit des oder der übrigen Betriebsparameter vorgegeben ist, wobei ein Warnsignal erzeugt wird, wenn der gemessene Wert vom ermittelten Normwert um einen unzulässigen Betrag oder Faktor abweicht.
- Strömungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Strömungskanalquerschnitt von der Erfassungseinrichtung (11) als Betriebparameter erfaßt wird.
- Strömungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der ermittelte Normwert die Mindestmotordrehzahl ist.
- Strömungsvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Motordrehzahl mittels einer permanenterregten Meßspule der Erfassungseinrichtung (11) erfaßt wird, wobei die Meßspule mit am Rotor angeordneten Rotorflügeln in magnetischem Kontakt steht.
- Strömungsvorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Strömungskanalquerschnitt mittels eines Einstellschalters (15) vorgebbar ist.
- Strömungsvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Einstellschalter (15) von einem Potentiometer gebildet ist, das insbesondere mehrere Raststellungen aufweist und gemeinsam mit der Auswerteeinheit (12) einen Stufenschalter bildet.
- Strömungsvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die den Motor speisende Versorgungsspannung von der Erfassungseinrichtung (11) als Betriebsparameter erfaßt wird.
- Strömungsvorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Versorgungsspannung in Form einer Wechselspannung vorliegt.
- Strömungsvorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß bei der Erfassung des Motorstromes und der Versorgungsspannung während einer Halbwelle des Motorstromes bzw. der Versorgungsspannung mehrere Meßwerte aufgenommen und anschließend zu einem Halbwellen-Mittelwert gemittelt werden.
- Strömungsvorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß bei der Erfassung des Motorstromes und der Versorgungsspannung die Halbwellen-Mittelwerte mehrerer aufeinanderfolgender Halbwellen ermittelt und zu einem Gesamtmittelwert gemittelt werden.
- Strömungsvorrichtung nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß eine manuell einstellbare Leistungsregelung des Motors vorgesehen ist, die insbesondere durch eine Phasenanschnittsteuerung realisiert ist.
- Strömungsvorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Auswerteeinheit (12) einen programmierbaren Mikrocontroller (25) aufweist.
- Strömungsvorrichtung nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die Auswerteeinheit (12) einen Speicher (26) enthält, der insbesondere von einem EEPROM gebildet ist.
- Strömungsvorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß im Speicher (26) der Auswerteeinheit (12) ein Kennlinienfeld oder eine Tabelle abgelegt ist, mittels dem bzw. der der Normwert ermittelbar ist.
- Strömungsvorrichtung nach Anspruch 14, dadurch gekennzeichnet, daß eine Kalibriereinrichtung (29) vorhanden ist, mittels der das Kennlinienfeld an neue Betriebsbedingungen anpaßbar ist.
- Strömungsvorrichtung nach Anspruch 15, dadurch gekennzeichnet, daß die Kalibriereinrichtung (29) bei im Betrieb befindlicher Strömungsvorrichtung auf Anforderung den Kalibriervorgang auslöst, wobei das Kennlinienfeld an die momentan vorliegenden Betriebsparameter angepaßt wird.
- Strömungsvorrichtung nach Anspruch 15 oder 16, dadurch gekennzeichnet, daß die Kalibriereinrichtung (29) nur durch vorherige Eingabe einer Codesequenz betrieben werden kann.
- Strömungsvorrichtung nach einem der Ansprüche 15 bis 17, dadurch gekennzeichnet, daß die Kalibriereinrichtung (29) in der Auswerteeinheit (12) enthalten ist.
- Strömungsvorrichtung nach einem der Ansprüche 13 bis 18, dadurch gekennzeichnet, daß die im Speicher (26) abgelegten Daten mittels eines Kontrollgerätes auslesbar sind.
- Strömungsvorrichtung nach einem der Ansprüche 1 bis 19, dadurch gekennzeichnet, daß die Überwachungseinrichtung (10) nach dem Anlegen der Versorgungsspannung einen Test durchführt, wobei die ordnungsgemäße Funktion der Strömungsvorrichtung überprüft und zweckmäßigerweise das Vorliegen eines Fehlers gegebenenfalls angezeigt wird.
- Strömungsvorrichtung nach einem der Ansprüche 1 bis 20, dadurch gekennzeichnet, daß der Motor bei Überhitzung von der Versorgungsspannung abgetrennt wird, wobei ein erneutes Anlegen der Versorgungsspannung an den Motor erst nach Beendigung des Überhitzungszustandes möglich ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1997149478 DE19749478A1 (de) | 1997-11-08 | 1997-11-08 | Strömungsvorrichtung |
| DE19749478 | 1997-11-08 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0915549A2 true EP0915549A2 (de) | 1999-05-12 |
| EP0915549A3 EP0915549A3 (de) | 2000-05-31 |
| EP0915549B1 EP0915549B1 (de) | 2014-06-18 |
Family
ID=7848082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19980119067 Expired - Lifetime EP0915549B1 (de) | 1997-11-08 | 1998-10-08 | Strömungsvorrichtung |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0915549B1 (de) |
| DE (1) | DE19749478A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10017861A1 (de) * | 1999-08-04 | 2001-03-15 | Ksb Ag | Störungsüberwachung |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0479609A2 (de) | 1990-10-05 | 1992-04-08 | Hitachi, Ltd. | Staubsauger und Verfahren zur Steuerung desselben |
| DE4116407A1 (de) | 1991-05-18 | 1992-11-19 | Preh Elektro Feinmechanik | Elektronische staubsauger-steuerschaltung |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4370690A (en) * | 1981-02-06 | 1983-01-25 | Whirlpool Corporation | Vacuum cleaner control |
-
1997
- 1997-11-08 DE DE1997149478 patent/DE19749478A1/de not_active Withdrawn
-
1998
- 1998-10-08 EP EP19980119067 patent/EP0915549B1/de not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0479609A2 (de) | 1990-10-05 | 1992-04-08 | Hitachi, Ltd. | Staubsauger und Verfahren zur Steuerung desselben |
| DE4116407A1 (de) | 1991-05-18 | 1992-11-19 | Preh Elektro Feinmechanik | Elektronische staubsauger-steuerschaltung |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0915549B1 (de) | 2014-06-18 |
| EP0915549A3 (de) | 2000-05-31 |
| DE19749478A1 (de) | 1999-05-12 |
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